Combination countersink and bit-gage



H. L. STOREY.

COMBINATION COUNTERSINK AND BIT GAGE. APPLICATION HLEUJULY 12. 1918.

Patented Mar. 23,1920,

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UNITED STATES PATENT OFFICE.

HENRY L. STOREY, OF KERRVILLE, TEXAS.

COMBINATION COUNTERSINK AND BIT-GAGE.

Application filed July 12, 1918.

To all to/tom may concern:

Be it known that I, HENRY L. STOREY, a citizen of the United States, residing at lien-ville, in the county of Kerr and State of Texas, have invented certain new and useful Improvements in Combination Countersinks and BitGages, of which the following is a specification.

This invention is a tool and has special reference to a combination counter-sink and bit gage.

no object of this invention is the production of a tool to be applied to a drill or bit, thus facilitating the simultaneous performance of the two functions of drilling and forming a counter-sink and at the same time and by a single operation of the bit drill.

Another object of this invention is the production of a combination counter-sink and bit gage which is constructed to facilitate the application of the device to drills or bits of various sizes, thus allowing the device to be applied at different points along the drill or hit, whereby the drill or hit may be used in the usual manner and then the inward movement of the drill or bit will be limited by the device which will in turn form a counter-sink.

Another object of this invention is the production of a combination counter-sink and bit gage which includes a plurality of jaws, having means for forcing the same into a binding engagement with a drill or hit, thus holding the device in an adjusted position and facilitating the formation of a countersink and at the same time the drill or hit is in operation.

Broadly stated, the invention consists of an outer cylindrical casing which is internally threaded, a core movably mounted within said casing, a collar carried by said casing, supporting elements carried by said collar and extending through said core, gripping jaws carried by said supporting means and being in position to be engaged by said core, thus allowing the gripping jaws to be brought into a binding engagement with a drill or bit for holding the device in a set position, said jaws having cutting edges thereon which facihtate the forming of counter-sinks and at the same time the drill or hit is in operation.

One practical form of construction and assembly of the present invention will be Specification of Letters Patent.

Patented Mar. 23, 1920.

Serial no. 244,661.

hereinafter described and is illustrated in the accompanying drawing, in which Figure l is a side elevation of the co1nbination countersink and bit gage, showing the same mounted upon a drill.

Fig. 2 is a central vertical section through the device, the drill being shown in fragmentar I elevation.

F ig. 3 is a top plan view of the device, the drill being shown in section, and

Fig. f is a bottom plan view of the device, the drill also being shown in section.

In the preferred embodiment of the pres ent invention about to he described, it will be seen that the sleeve 5 is cylindrical in order to allow the core and other elements to be easily inserted thereinto, as will be hereinafter set forth. This sleeve 5 is internally threaded throughout its entire length as indicated at 6 and it will also be noted that a plurality of thumb openings 'l' are formed therethrough.

The collar 8 is of a dish like construction and is inserted into the upper end of the sleeve 5, as illustrated clearly in Figs. 2 and 3. This collar 8 is held against displacement by screws 9 which pass through the sleeve 5 and to the collar 8 to the periphery thereof. It will be noted that this collar is provided with a central opening 10, for purposes to be hereinafter set forth and that the retaining screws 11 are carried by the collar 9 and extend into the opening 10, as

also shown in Figs. :2 and It will be noted that the rctainin screws 11 are provided with squared outer ends 12, whereby a suitable implement n'lay be applied to these squared ends for rotating the retaining screws 11 as desired.

The supporting springs 13 are elongated and have projections 1a which extend at right angles thereto. These projections 1d are positioned upon the inner surface of the collar 0 and are retained in set position by the retaining elements 15 passed therethrough and engaging the collar. These springs are arranged to extend substantially parallel to each other, as shown in Fig. 4|: for purposes to be hereinafter set forth.

The gripping jaws 16 are substantially sector shaped, as suggested in Fig. l, it being noted that there are several jaws positioned beside each other. The lower ends of the spring 13 extend into the jaws 16 for supporting the same. The surfaces of the jaws 16 slant rearwardly as indicated at 17 toward the .top of the device, thus presenting a comparatively wedge shaped construction, as illustrated in Fig. 2. Each jaw 16 is provided with a cutting edge 18 upon its lower outer end and it will be noted that these cutting edges 18 slant upwardly in order to give the correct shape to the countersink to be formed by these cutting edges, as will be hereinafter explained.

The core 19 is externally threaded, as indicated at 20, thus ermitting the same to be carried within the sleeve 5. It will also be noted that the outer surface of the core 19 has Vertically cut lines, which in combination with the threads give the core a milledv like surface, as indicated at 21, thus facili tat-ing the gripping of the core 19 through the thumb openings 7, as shown in Figs. 1 and 2, whereby the core may be rotated in either of two directions and be moved toward either end 0-; the sleeve, by operation of handles. The core is also provided with sockets 22 formed therein, whereby suitable implements may be passed through the thumb openings 7 and engaged with the core 19, for rotating the core as desired or for binding the same in engagement with the gripping jaws as will be hereinafter explained. This core 19 is provided with an enlarged bore 3 ext nding longitudinally therethrough, as shown in Fig. 2, thus providing sufiieient space for the springs 13 and also for a drill or bit upon which the tool is carried when in use.

This core 19 is also hollowed out to provide a substantially frusto-conical inner portion 24, as shown in Fig. 2, whereby the frusto-conical nortion as may he brought into a binding engagement with the gripping jaws owing to their slanting construction provides wedge shaped structures, thus bringing the jaws into a clamping engagement with a drill or hit, 25, which carries the tool.

When this device is in operation, the core 19 may be moved to a point contiguous to the collar 8 and for this reason the gripping jaws 16 may be moved outwardly from each other. At this time, the drill or hit 25 may be extended between the jaws 16 and through the bore 15 and also the core 19 and the opening 10 formed in the core 8. It is obvious that the device may be moved to a desired position along the drill or bit upon which the same is carrie l.

At this time, the retaining screws 11 may be turned to a binding engagement with the drill or hit 25, thus supporting the device in a set position upon the drill or hit. At this time the operator may grip the core 19 through the thumb openings 7 or a pair of suitable implements through the thumb openings to engage the sockets 2:2 and at this time, the core may be rotated to move within the sleeve 5, away from the collar 8. As this core moves away from the collar, it is obvious it will move into a binding engage ment with the gripping jaws 16, and will thus cause these gripping jaws to be brought into a binding engagement with the bit or drill extending therebctween. It is obvious that owing to the wedge shaped construction of the jaws 1G and the trusto-conical portion 2 1 of the core 19, the core may move for a considerable distance, and at the same time continue the collapsing of the several jaws until the same have been brought into a binding engagement with the bit extending therethrough. Thus it will be seen that hits and drills of various may be inserted through the device.

At this time, the structure is in condition for use. The drill or hit is operated by the usual mechanism or bracedevice and it is therefore obvious the drill or bit will here into the material engaged thereby. As the invention thus described is carried in a set position upon the drill or hit, it is obvious the movement of the drill or bit will be limited in its movement into the article so drilled or bored. hen the combination counter-sink and bit gage finally engage the article or device being bored or drilled, it is obvious the cutting edges will form a connter-sink due to the rotary motion which is being imparted to the structure. Furthermore, the cutting edges 18 slant upwardly from points adjacent the drill or bit :25 extending therethrough, it will be seen that the cutting edges are in position to 'l'orm :1 counter-sink.

In devices now in use, after a hole has been bored or drilled, it is necessary to use a different tool for forming the counter-sink adjacent the hole so bored or drilled. lVith the present invention however, the hole and the counter-sink are simultaneously drilled thereby saving considerable time in the formation of such a structure.

After the device has been used, it is obvious the core 19 may be rotated to pass toward the collar 8 and thus relieve the jaws 16 from clamped engagement with the drill or hit extending therethrough. The retaining screws 11 may then release the drill and then at this time, the device may be moved from the drill or hit carried in n vertical position.

From the foregoing description, it will be seen that a combination counter-sink and bit gage has been produced which may be quickly applied to drills and bits of various sizes and which are positively retained in a set position by set screws. It will be seen that the gripping jaws are carried upon. the springs 13 and that the manner of movement of the bore is such as to move the jaws into clamping engagement or release the same when it is desired to discontinue the use of the device.

The foregoing description and the drawings have reference to what may be considered the preferred, or approved, form of my invention. It is to be understood that I may make such changes in construction and arrangement and combination of parts, materials, dimensions, et cetera, as may prove expedient and fall within the scope of the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a device of the character described, the combination of a collar having a central opening flatsprings having right angularly extending projectlons fixed upon said collar, wedge shape gripping jaws fixed upon the free ends of said springs, said jaws having cutting edges on their outer ends, an internally threaded sleeve permanently fixed upon said collar, one end of said sleeve terminating in permanent transverse alinement with the cutting edges of said jaws, said sleeve having thumb openings formed therethrough, and an externally threaded core rotatable within said sleeve and engageable through said openings, whereby the core may be moved to force said jaws together to allow the jaws to grip bits of varlous sizes.

In a device of the character described, the combination of a collar, gripping jaws swingably mounted upon said collar, the outer ends of said jaws having outwardly beveled ends forming cutting edges, an in ternally threaded sleeve fixed upon said collar and having thumb openings, an exvarious sizes may be gripped by said jaws,

the forward end of said sleeve terminating evenly with outer ends of the cutting edges of said jaws, whereby said sleeve will limit the inward movement of said bit and said jaws into a piece of work, although said core will be shielded from being accidentally struck and moved to release said jaws.

A device of the character described, the combination of a supporting element, wedge jaws swingably supported upon said element, an internally threaded sleeve fixed upon said element, said jaws being outwardly beveled on their outer ends, the forward end of said sleeve terminating evenly with outer ends of the cutting edges of said jaws, said sleeve having thumb openings therein and an, externally threaded. core movable within said sleeve and being engageable through said thumb openings, said core having lines cut therein transverse to the threaded surface thereof to form a milled surface, whereby the core may be easily moved to shift said jaws toward each. other to clamp various sized bits, said sleeve limiting movement of the bit and jaws into a piece of work, and at the same time shielding said core to hold the same from being accidentally struck and moved. to release said jaws.

In testimony whereof I ailix my signature in presence of two witnesses.

HENRY L. STOREY. Witnesses:

HENRY M. BLUM, HENRY Simona. 

